:root {
  --navy: #0A1F44;
  --navy-light: #1E3A6E;
  --yellow: #FFD700;
  --green: #00C853;
  --red: #FF3B30;
  --surface: #F5F7FA;
  --white: #FFFFFF;
  --gray: #6B7280;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  --font-headline: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-pill: 999px;
  --shadow-sm: 0 8px 30px rgba(10, 31, 68, .06);
  --shadow-md: 0 16px 40px rgba(10, 31, 68, .12);
  --grad-brand: linear-gradient(135deg, #FFD700 0%, #FFB800 100%);
  --grid-gap: 24px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  background: var(--surface);
  color: var(--navy);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  font-weight: 900;
  line-height: 1.15;
  color: var(--navy);
  margin: 0 0 .5em;
}

p, ul, ol, dl, blockquote, figure {
  margin: 0 0 1rem;
}

ul[class] {
  list-style: none;
  padding: 0;
  margin: 0;
}

a {
  color: var(--navy);
  text-underline-offset: 3px;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 3px;
}

#main-content {
  scroll-margin-top: 24px;
}

#main-content:focus {
  outline: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 32px);
}

.skip-link {
  position: fixed;
  left: -9999px;
  top: 12px;
  z-index: 1000;
  display: inline-flex;
  align-items: center;
  background: var(--yellow);
  color: var(--navy);
  padding: 10px 18px;
  border-radius: 0 0 14px 0;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(10, 31, 68, .25);
}

.skip-link:focus {
  left: 12px;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 600;
  background: linear-gradient(90deg, var(--yellow) 0%, var(--green) 70%, var(--red) 100%);
  box-shadow: 0 0 10px rgba(255, 215, 0, .35);
  pointer-events: none;
}

.site-header {
  position: relative;
  background: var(--navy);
  color: #FFFFFF;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.site-header::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: 0;
  width: 42%;
  height: 4px;
  background: linear-gradient(90deg, var(--yellow), var(--green));
  transform: skewX(-24deg);
  transform-origin: right bottom;
  pointer-events: none;
}

.site-header__bar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, .14);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #FFFFFF;
  text-decoration: none;
  min-width: 0;
}

.brand-logo {
  position: relative;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--yellow);
  box-shadow: 0 4px 14px rgba(255, 215, 0, .35);
  overflow: hidden;
}

.brand-logo::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 9px;
  width: 20px;
  height: 20px;
  border: 2px solid var(--navy);
  border-radius: 50%;
}

.brand-logo::after {
  content: "";
  position: absolute;
  left: 18px;
  top: 4px;
  width: 2px;
  height: 30px;
  background: var(--navy);
  transform: rotate(45deg);
}

.brand-name {
  font-family: var(--font-headline);
  font-size: 22px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: .03em;
}

.brand-suffix {
  margin-left: 4px;
  padding-left: 8px;
  border-left: 1px solid rgba(255, 255, 255, .25);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--yellow);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-search {
  display: flex;
  align-items: center;
  background: rgba(245, 247, 250, .08);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius-pill);
  padding: 4px;
}

.header-search-input {
  width: 140px;
  background: transparent;
  border: 0;
  outline: none;
  color: #FFFFFF;
  font-size: 14px;
  line-height: 1;
  padding: 8px 4px 8px 14px;
}

.header-search-input::-webkit-search-cancel-button {
  display: none;
}

.header-search-input::placeholder {
  color: rgba(255, 255, 255, .5);
}

.header-search-btn {
  border: 0;
  background: var(--yellow);
  color: var(--navy);
  border-radius: var(--radius-pill);
  padding: 7px 14px;
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  transition: background .2s ease;
}

.header-search-btn:hover {
  background: #FFE54A;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: var(--radius-pill);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  transition: background .2s, border-color .2s;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, .08);
  border-color: rgba(255, 255, 255, .45);
}

.nav-toggle-label {
  line-height: 1;
}

.nav-toggle-icon {
  display: block;
  position: relative;
  width: 18px;
  height: 2px;
  background: #FFFFFF;
  border-radius: 2px;
  transition: background .2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: #FFFFFF;
  border-radius: 2px;
  transition: transform .2s ease;
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 120;
  background: var(--navy);
  border-top: 1px solid rgba(255, 255, 255, .08);
  box-shadow: 0 16px 36px rgba(2, 10, 28, .4);
}

.site-nav[data-open] {
  display: block;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 12px 0 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-link {
  display: block;
  padding: 11px 18px;
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, .82);
  font-weight: 600;
  text-decoration: none;
  transition: background .2s, color .2s;
}

.nav-link:hover {
  color: var(--yellow);
  background: rgba(255, 255, 255, .06);
}

.nav-link[aria-current="page"] {
  background: var(--yellow);
  color: var(--navy);
}

.site-footer {
  position: relative;
  background: var(--navy);
  color: rgba(255, 255, 255, .7);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--yellow) 0%, var(--green) 55%, var(--red) 100%);
}

.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .032) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-top: 60px;
  padding-bottom: 40px;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.footer-trust {
  background: rgba(255, 255, 255, .05);
  border-left: 3px solid var(--yellow);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 16px 18px;
  color: rgba(255, 255, 255, .72);
  font-size: 14px;
  line-height: 1.75;
}

.footer-col {
  min-width: 0;
}

.footer-title {
  margin: 0 0 16px;
  color: #FFFFFF;
  font-size: 14px;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.footer-links a {
  display: inline-flex;
  color: rgba(255, 255, 255, .68);
  text-decoration: none;
  transition: color .2s, transform .2s;
}

.footer-links a:hover {
  color: var(--yellow);
  transform: translateX(4px);
}

.footer-contact p {
  margin: 0 0 8px;
  color: rgba(255, 255, 255, .68);
  line-height: 1.6;
}

.footer-meta {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 20px;
  padding-bottom: 28px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  color: rgba(255, 255, 255, .5);
  font-size: 13px;
}

.footer-meta a {
  color: rgba(255, 255, 255, .68);
  text-underline-offset: 3px;
}

.footer-meta a:hover {
  color: var(--yellow);
}

.footer-copyright {
  margin: 0;
}

.footer-note {
  margin: 0;
  color: rgba(255, 255, 255, .45);
}

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 200;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--yellow);
  color: var(--navy);
  border: 0;
  border-radius: var(--radius-pill);
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(10, 31, 68, .28);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .3s, visibility .3s, transform .3s;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: #FFE54A;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  background: transparent;
  transition: transform .2s, box-shadow .2s, background .2s, color .2s;
}

.btn:active {
  transform: scale(.97);
}

.btn--primary {
  background: var(--yellow);
  color: var(--navy);
  box-shadow: 0 8px 20px rgba(255, 215, 0, .25);
}

.btn--primary:hover {
  background: #FFE54A;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255, 215, 0, .32);
}

.btn--ghost {
  background: rgba(255, 255, 255, .08);
  border-color: rgba(255, 255, 255, .35);
  color: #FFFFFF;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, .16);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  font-size: 14px;
  color: var(--gray);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: rgba(10, 31, 68, .3);
}

.breadcrumb a {
  color: var(--navy);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.content-section {
  padding: 56px 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 30px;
}

.section-title {
  margin: 0;
  font-size: clamp(26px, 4vw, 40px);
  letter-spacing: -.02em;
}

.section-note {
  max-width: 560px;
  margin: 0;
  color: var(--gray);
  font-size: 14px;
}

.vision-label {
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gray);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--grid-gap);
}

.grid--2 > *,
.grid--3 > * {
  grid-column: span 12;
}

.card {
  background: var(--white);
  border: 1px solid rgba(10, 31, 68, .06);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s ease, box-shadow .25s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card--metric {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, var(--navy-light), var(--navy));
  color: #FFFFFF;
}

.card--metric::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(255, 215, 0, .15);
  border: 12px solid rgba(255, 215, 0, .08);
}

.metric-value {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: clamp(32px, 5vw, 48px);
  font-style: italic;
  font-weight: 900;
  line-height: 1;
  color: var(--yellow);
}

.metric-label {
  position: relative;
  z-index: 1;
  margin-top: 10px;
  color: rgba(255, 255, 255, .68);
  font-size: 14px;
}

.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--gray);
  vertical-align: middle;
}

.status-dot--online {
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(0, 200, 83, .15);
}

.status-dot--warn {
  background: var(--red);
  box-shadow: 0 0 0 4px rgba(255, 59, 48, .15);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(10, 31, 68, .06);
  color: var(--navy);
  font-size: 13px;
  font-weight: 600;
}

.tag--yellow {
  background: rgba(255, 215, 0, .18);
  color: #7A5C00;
}

.tag--green {
  background: rgba(0, 200, 83, .14);
  color: #006B2A;
}

.tag--red {
  background: rgba(255, 59, 48, .12);
  color: #B9140C;
}

.slant {
  display: inline-block;
  padding: 6px 16px;
  background: var(--yellow);
  color: var(--navy);
  border-radius: 4px;
  font-weight: 800;
  transform: skewX(-12deg);
}

.slant > * {
  display: inline-block;
  transform: skewX(12deg);
}

.media {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  background: var(--navy-light);
}

.media::before {
  content: "";
  display: block;
}

.media--16-9::before {
  padding-top: 56.25%;
}

.media--4-3::before {
  padding-top: 75%;
}

.media-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, .62);
  background: linear-gradient(145deg, var(--navy-light) 0%, var(--navy) 100%);
  font-size: 14px;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.media-placeholder::after {
  content: "";
  position: absolute;
  right: 10%;
  bottom: 10%;
  width: 48px;
  height: 48px;
  border: 2px dashed rgba(255, 215, 0, .4);
  border-radius: 50%;
}

.table-wrap {
  overflow-x: auto;
  background: var(--white);
  border: 1px solid rgba(10, 31, 68, .06);
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
}

.table-wrap table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

.table-wrap th,
.table-wrap td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(10, 31, 68, .06);
}

.table-wrap th {
  background: var(--navy);
  color: #FFFFFF;
  font-size: 14px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.table-wrap tr:last-child td {
  border-bottom: 0;
}

.blueprint-grid {
  position: relative;
}

.blueprint-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(10, 31, 68, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 31, 68, .05) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

[data-chapter-link] {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(10, 31, 68, .12);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--navy);
  text-decoration: none;
  transition: background .2s, color .2s, box-shadow .2s;
}

[data-chapter-link].is-active {
  background: var(--yellow);
  color: var(--navy);
  border-color: transparent;
  box-shadow: 0 6px 18px rgba(255, 215, 0, .3);
}

@media (min-width: 640px) {
  .grid--2 > *,
  .grid--3 > * {
    grid-column: span 6;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px) {
  .site-header__bar {
    justify-content: center;
  }

  .header-actions {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
  }

  .header-search-input {
    width: 200px;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: block;
    position: static;
    box-shadow: none;
    border-top: 0;
  }

  .nav-list {
    flex-direction: row;
    justify-content: center;
    gap: 6px;
    padding: 14px 0 18px;
  }

  .nav-link {
    padding: 10px 16px;
  }

  .footer-meta {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
  }

  .footer-note {
    flex-basis: 100%;
    text-align: center;
    padding-top: 6px;
  }
}

@media (min-width: 992px) {
  .grid--2 > * {
    grid-column: span 6;
  }

  .grid--3 > * {
    grid-column: span 4;
  }

  .footer-grid {
    grid-template-columns: 1.3fr .7fr .7fr 1.1fr;
    gap: 48px;
  }
}

@media (max-width: 520px) {
  .header-search {
    display: none;
  }

  .nav-toggle-label {
    font-size: 13px;
  }

  .brand-suffix {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .card:hover,
  .btn--primary:hover,
  .back-to-top,
  .footer-links a {
    transform: none;
  }
}